JPS6020361A - Floppy disk device - Google Patents
Floppy disk deviceInfo
- Publication number
- JPS6020361A JPS6020361A JP12903183A JP12903183A JPS6020361A JP S6020361 A JPS6020361 A JP S6020361A JP 12903183 A JP12903183 A JP 12903183A JP 12903183 A JP12903183 A JP 12903183A JP S6020361 A JPS6020361 A JP S6020361A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- output
- switching
- floppy disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
- G11B19/128—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark involving the detection of track pitch or recording density
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/26—Speed-changing arrangements; Reversing arrangements; Drive-transfer means therefor
Landscapes
- Rotational Drive Of Disk (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は70ツピデイスク装置に関し、特に位相同期回
路出力によりフロッピディスクの回転数制御を行うフロ
ッピディスク装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a 70-speed disk device, and more particularly to a floppy disk device that controls the rotational speed of a floppy disk using a phase synchronization circuit output.
一般に70ツピデイスクには何種類かの記録密度があり
、従来はそのデータを読み取る場合、記録密度が等しい
70ツピデイスク装置を使用しなければならなかった。In general, there are several types of 70 discs with different recording densities, and conventionally, when reading data from them, it was necessary to use 70 discs with the same recording density.
従って70ツピデイスクへの記録操作者が記録時の記録
密度を記憶または記載しておいて、データ読取勺時にそ
の記録密度に適合したフロッピディスク装置を選択しな
ければならないという欠点があった。Therefore, there is a drawback in that a recording operator on a 70 disk has to memorize or write down the recording density at the time of recording, and then select a floppy disk device suitable for the recording density when reading data.
本発明の目的は、位相同期回路出力によジフロッピディ
スクの回転数制御を行うことにより上記欠点を解決し、
フロッピディスクの記録密度に関係なく1機種でデータ
読取りを行えるようにした70ツピデイスク装置を提供
することにある。An object of the present invention is to solve the above-mentioned drawbacks by controlling the rotation speed of a di-floppy disk using the output of a phase-locked circuit.
To provide a 70 disk device capable of reading data with one model regardless of the recording density of the floppy disk.
本発明によれば、読取りデータに同期してサンプリング
クロックを発生する位相同期回路と、該サンプリングク
ロックと読取シデータとを入力とし同期がとれたことを
検知する同期検知回路と、一定時間のタイミング信号を
出力するタイマ回路と、前記同期検出回路出力とタイマ
回路出力を入力とする切替回路と、該切替回路出力によ
りフロッピディスクの回転数を少なくとも2段階に切替
え制御するモータ制御回路とを備えることを特徴とする
70ツピデイスク装置が得られる。According to the present invention, there is provided a phase synchronization circuit that generates a sampling clock in synchronization with read data, a synchronization detection circuit that receives the sampling clock and the read data as input and detects that synchronization has been achieved, and a timing signal for a certain period of time. , a switching circuit receiving the synchronization detection circuit output and the timer circuit output as inputs, and a motor control circuit switching and controlling the rotational speed of the floppy disk in at least two stages using the switching circuit output. A characteristic 70 disk device is obtained.
次に図面を参照して本発明について説明する。Next, the present invention will be explained with reference to the drawings.
第1図は本発明の70ツピデイスク装置の一実施例を示
すブロック図および第2図は第1図における主要人出力
信号の一例を示すタイムチャートである。同図において
、70ツピデイスク装置は読取シデータaを入力としこ
れと同期してサンプリングパルスSを発生する位相同期
回路(以下VFO)1と、前記読取シデータaおよびサ
ンプリングパルスsff:入力し両者の同期がとれたこ
とを検出しロック信号ef出力するロック回路(以下L
CK)2と、70ツピデイスクコントローラ(図示して
いない)から出力されるシンク信号Cおよび70ツピデ
イスクが1回転するごとに出力されるインデックス信号
すをそれぞれ端子MRおよび端子CPに入力し且つ出力
端子Qと入力端子りとが結合されたD形7リツグ70ツ
ブ(以下F/F )で構成されるタイマ回路(以下TM
)3と、該TM3出力のタイマ信号dと前記ロック信号
eとを入力とするアンドゲート(以下AND)4と、A
ND4出力を端子CPに入力し且つ出力端子Qと入力端
子り、とが結合されたD形F/F で構成される切替回
路(以下8W)5と、8.W5出力の切替信号fによシ
クロツク源(図示していない)からのモータ制御基準ク
ロッフグまたはhを選択する選択回路(以下5EL)6
0を含んで成9制御信号iを出力するモータ制御回路(
以下CTL)6とから成る。FIG. 1 is a block diagram showing an embodiment of a 70-tube disk device of the present invention, and FIG. 2 is a time chart showing an example of the main person output signal in FIG. In the same figure, the 70 disc device has a phase locked circuit (hereinafter referred to as VFO) 1 which inputs read data a and generates a sampling pulse S in synchronization with the read data a, and a phase locked circuit (hereinafter referred to as VFO) 1 which inputs read data a and a sampling pulse Sff and synchronizes both. A lock circuit (hereinafter referred to as L) that detects that the lock is released and outputs a lock signal ef
CK) 2, a sync signal C output from a 70-tube disc controller (not shown), and an index signal S output every time the 70-tube disc rotates once are input to and output from terminals MR and CP, respectively. A timer circuit (hereinafter referred to as TM
) 3, an AND gate (hereinafter referred to as AND) 4 whose inputs are the timer signal d of the TM3 output and the lock signal e, and A
8. A switching circuit (hereinafter referred to as 8W) constituted by a D-type F/F in which the ND4 output is input to the terminal CP and the output terminal Q and the input terminal are coupled; A selection circuit (hereinafter referred to as 5EL) 6 that selects a motor control reference clock signal or h from a clock source (not shown) based on the switching signal f of the W5 output.
A motor control circuit that outputs a control signal i including 0 (
(hereinafter referred to as CTL)6.
&>、LCK2はシンクバイトにおいてVF010ツク
と読取シデータとが1:2の関係を20発程度サンプリ
ングされたときロックしたとみなす公知の回路であシ、
ロック信号eとしてロック時にはハイ”H″を、非ロツ
ク時にはロー”L″を出力する。またTM3はシンク信
号Cがノ1イ1H1になるとその後のインカフス信号す
により反転を繰り返す声。更に8W5はAND4の立上
りエツジによ・って反転するのでAND4人力のロック
信号eがノ・イ1H1になった時の切替信号fの値を保
持する。&>, LCK2 is a known circuit that assumes that the sync byte is locked when the relationship of 1:2 between VF010 and the read data is sampled about 20 times.
As the lock signal e, a high "H" is output when the lock is locked, and a low "L" is output when the lock is not locked. In addition, TM3 is a voice that repeats inversion when the sync signal C becomes 1H1 and then the incuff signal changes. Further, since 8W5 is inverted by the rising edge of AND4, it holds the value of the switching signal f when the AND4 manual lock signal e becomes 1H1.
続いて本実施例の動作について説明する。Next, the operation of this embodiment will be explained.
高密度媒体が装填されるとシンク信号Cがハイ1)(1
にな9タイマ信号dが反転を始める。ロック信号eがロ
ー”Llである間はタイマ信号dの立上りエツジAND
4’e介してSW5が反転するので切替信号fが反転す
る。この切替信号fにより8EL60はモータ制御基準
クロックVまたはhを選択し制御信号iを変化させる。When high-density media is loaded, the sink signal C is high 1) (1)
At 9, the timer signal d starts to invert. While the lock signal e is low “Ll”, the rising edge of the timer signal d is AND
Since SW5 is inverted via 4'e, the switching signal f is inverted. Based on this switching signal f, the 8EL60 selects the motor control reference clock V or h and changes the control signal i.
その後ロック信号eがハイ“H″になると、その彼のT
M3の反転によるタイマ信号dは無効になりその時の制
御信号iが保持される。第2図では切替信号fがハイ“
H“の区間はモータ制御基準クロックhが選択され、そ
の他の区間はモータ制御基準クロッフグが選択されて制
御信号iとなっている例を示している。After that, when the lock signal e goes high, his T
The timer signal d due to the inversion of M3 becomes invalid, and the control signal i at that time is held. In Figure 2, the switching signal f is high.
An example is shown in which the motor control reference clock h is selected in the section H", and the motor control reference clock h is selected in the other sections and becomes the control signal i.
従って本実施例によれば、タイマ信号dが2段階であり
制御信号iによって70ツピデイスクの回転数を2段階
に切替え制御することにより記録密度の異なる媒体のデ
ータを読み取ることができる。Therefore, according to this embodiment, the timer signal d has two stages, and by switching and controlling the rotational speed of the 70 disk in two stages using the control signal i, it is possible to read data from media with different recording densities.
なお本実施例は2段階切替制御を示したが、本発明は3
段階以上の切替制御にも適用することができる。Although this embodiment shows two-stage switching control, the present invention has three-stage switching control.
It can also be applied to switching control over stages.
以上の説明により明らかなように本発明の70ツピデイ
スク装置によれば、位相同期回路出力によりフロッピデ
ィスクの回転数制御を行うので、記録密度が異なる媒体
のデータを読み取る際、記録密度に適合した70ッピデ
ィスク装置全選択する必要がなく1機種でデータ読取り
を行い得るという効果が生じる。As is clear from the above explanation, according to the 70 disk disk device of the present invention, the rotational speed of the floppy disk is controlled by the output of the phase synchronization circuit, so when reading data from media with different recording densities, the 70 disk drive adapted to the recording density is used. There is an effect that it is not necessary to select all the disk devices, and data can be read with one model.
第1図は本発明の70ツピデイスク装置の一実施例を示
すブロック図および第2図は第1図における主要人出力
信号の一例を示すタイムチャートである。FIG. 1 is a block diagram showing an embodiment of a 70-tube disk device of the present invention, and FIG. 2 is a time chart showing an example of the main person output signal in FIG.
Claims (1)
る位相同期回路と、該サンプリングクロックと読取シデ
ータとを入力とし同期がとれたこと全検知する同期検知
回路と、一定時間のタイミング信号を出力するタイマ回
路と、前記同期検出、回路出力とタイマ回路出力を入力
とする切替回路と、該切替回路出力によりフロッピディ
スクの回転数を少なくとも2段階に切替え制御するモー
タ制御回路とを備えることを特徴とするフロッピディス
ク装置。A phase synchronization circuit that generates a sampling clock in synchronization with read data, a synchronization detection circuit that receives the sampling clock and read data as input and detects that synchronization has been achieved, and a timer circuit that outputs a timing signal for a certain period of time. A floppy disk, comprising: a switching circuit that receives the synchronization detection, circuit output, and timer circuit output; and a motor control circuit that switches and controls the rotational speed of the floppy disk in at least two stages using the switching circuit output. disk device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12903183A JPS6020361A (en) | 1983-07-15 | 1983-07-15 | Floppy disk device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12903183A JPS6020361A (en) | 1983-07-15 | 1983-07-15 | Floppy disk device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6020361A true JPS6020361A (en) | 1985-02-01 |
Family
ID=14999405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12903183A Pending JPS6020361A (en) | 1983-07-15 | 1983-07-15 | Floppy disk device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6020361A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0484905A2 (en) * | 1990-11-09 | 1992-05-13 | Brier Technology | Interface for disk drives |
US5169683A (en) * | 1986-09-25 | 1992-12-08 | Mazda Motor Corporation | Coating a rotating vehicle body |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5252603A (en) * | 1975-10-24 | 1977-04-27 | Sony Corp | Reproduction appartus |
-
1983
- 1983-07-15 JP JP12903183A patent/JPS6020361A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5252603A (en) * | 1975-10-24 | 1977-04-27 | Sony Corp | Reproduction appartus |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5169683A (en) * | 1986-09-25 | 1992-12-08 | Mazda Motor Corporation | Coating a rotating vehicle body |
EP0484905A2 (en) * | 1990-11-09 | 1992-05-13 | Brier Technology | Interface for disk drives |
EP0484905A3 (en) * | 1990-11-09 | 1994-12-14 | Brier Technology | Interface for disk drives |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH0223945B2 (en) | ||
KR100260066B1 (en) | Disc reproducing device | |
US4647828A (en) | Servo system | |
JPH0614735B2 (en) | Video playback device | |
JPH0620392A (en) | Information reproducing device and information recording and reproducing device | |
JPH0738267B2 (en) | Disk unit spindle motor control system | |
EP0316484A2 (en) | Method of and apparatus for synchronizing reproduction of a plurality of video information reproducing systems | |
JPS6020361A (en) | Floppy disk device | |
JP3193121B2 (en) | Phase locked loop circuit | |
JP3462896B2 (en) | Synchronous signal generator for EFM signal | |
JP3388205B2 (en) | Magnetic disk storage | |
JP2564260B2 (en) | Clock generation circuit | |
JPS6132253A (en) | Electronic editing servo method | |
JP2578546Y2 (en) | Optical disc playback device | |
KR100468682B1 (en) | Spindle motor control | |
JP2833033B2 (en) | PLL device | |
JPS63251961A (en) | Rotation controller for disk layer | |
JPH0429587A (en) | Motor serve device | |
KR840001041Y1 (en) | Control circuit for sound and characters signal | |
JPH0247653Y2 (en) | ||
JPH0318370B2 (en) | ||
JP2601058B2 (en) | Drum servo system | |
JPH0644809B2 (en) | Audio signal reproduction phase control circuit | |
JPH0320113B2 (en) | ||
JPS63864A (en) | Clock regeneration circuit |